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28-01-12, 10:54 PM
#11

Re: High Iso, how often...

Wish I understood more the purpose of ISO. Is there an ISO what's it all about thread on here?


     
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28-01-12, 11:17 PM
#12

Re: High Iso, how often...

Quote:
Originally Posted by Skyline View Post
Wish I understood more the purpose of ISO. Is there an ISO what's it all about thread on here?

I second that Dave.


     
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28-01-12, 11:22 PM
#13

Re: High Iso, how often...

Quote:
Originally Posted by Phil View Post
My cameras (40D and 1D2) are a few years old now and I tend to use up to ISO800.

'High' ISO is funny subject. Often people will show a shot they've taken at ISO a million and proclaim how amazing it is but in good light all that will happen is the shutter speed will be faster.

I said in another thread that upping the ISO works wonders for getting ultra fast shutter speeds in good light but the 'quality' of high ISO should be measured in low light against shutter speed.

I'm confident that I could do so much more if I went and bought a more recent body..
Agreed Phil, the later models seem to be creeping up slowly to some dizzy ISO ceilings now. Just look at the rumoured ISO abilities of the latest models from Canon and Nikon.

But I wonder how many of us want or use this feature? Personally I would like to see some R&D work done on dynamic range as well.

Quote:
Originally Posted by Azz View Post
I love high ISO capability for indoor shots, you can get some really natural looking shots in low light.
That was something I noticed with the very poorly light shot above, it is just one light (about 25 watts) in the corner of the room, yet there are no shadows.

Quote:
Originally Posted by Daisy View Post
I must admit that I would have expected it to have loads more noise at that setting Ken. I don't think I have ever gone above 800 and only use that very rarely.

Food for thought, thanks.


( goes off into the darkened cellar clutching camera)


Quote:
Originally Posted by totalnovice View Post
Sorry not that experienced yet, so can't really answer you. I read somewhere that high ISO with b&w can look good, have you tried that? (i think the point was that it added character through looking grainer)

Lovely cats btw.
Thanks Natalie, I did go through a phase of doing the odd noisy B&W pics, this is one I did some time back: HERE

Quote:
Originally Posted by Skyline View Post
Mines goes up to 6400. I admit 80% of the time mines on auto. I have a lot to learn on where it should be with the f number and shutter speed.
You should give it a go some time Dave.

Quote:
Originally Posted by SteveL View Post
I am very reluctant to go higher than ISO 400 though I have used 800 on rare occasions.

I think it is the remnants of my film days when ISO400 was a fast film and 800, although available, was very grainy.

Ingrained (pun not intended) prejudices I s'pose

Steve
Steve, I completely understand, I to come from a background of 35mm film days and the highest film speed I used was 400 ASA but even that was quite noisy and only used if necessary
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28-01-12, 11:28 PM
#14

Re: High Iso, how often...

In the old days ISO number indicated the sensitivity of the film.

ISO 50 was less sensitive than ISO 200 and needed more light to expose the film correctly. This led to slower shutter speed, larger apertures. The upside was that there was less graininess with the slower speed films.

In the digital age the sensor is constant. What alters is the amplification of the electrical signal from each pixel site on that sensor. However the more a signal is amplified the noisier it gets, hence higher ISO's = more digital noise.

Steve

Sorry Ken, a bit slow on the keyboard here
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28-01-12, 11:51 PM
#15

Re: High Iso, how often...

Quote:
Originally Posted by SteveL View Post
In the old days ISO number indicated the sensitivity of the film.

ISO 50 was less sensitive than ISO 200 and needed more light to expose the film correctly. This led to slower shutter speed, larger apertures. The upside was that there was less graininess with the slower speed films.

In the digital age the sensor is constant. What alters is the amplification of the electrical signal from each pixel site on that sensor. However the more a signal is amplified the noisier it gets, hence higher ISO's = more digital noise.

Steve

Sorry Ken, a bit slow on the keyboard here

Thank you for the explanation Steve, as i didn't understand why digital camera's had this, as i'm another one that started out with 35mm film,
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30-01-12, 01:45 AM
#16

Re: High Iso, how often...

Like the b&w Audi pic
It's it your car? Or is that what you photograph (cars)?

Really liked the photos Azz linked to, the wedding ones, they look so relaxed.
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30-01-12, 08:46 AM
#17

Re: High Iso, how often...

Quote:
Originally Posted by totalnovice View Post
Like the b&w Audi pic
It's it your car? Or is that what you photograph (cars)?

Really liked the photos Azz linked to, the wedding ones, they look so relaxed.
Thanks Natalie,

Yes, I've had it for a long time now, I can't see myself ever selling it. I fell in love with the whole design of it when they first came out in 1999.

I enjoy shooting cars, bikes, and planes the most as you'll see from the links in my sig at the bottom of my posts, but I enjoy all photography really .
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30-01-12, 03:02 PM
#18

Re: High Iso, how often...

Very rarely go above 400 myself, im not that adventurous, and as has been said often an afterthought for me.


     
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06-02-12, 06:28 PM
#19

Re: High Iso, how often...

ISO really is the last thing you want to be raising. Despite the fact that is undoubtably better with modern cameras, its still very limiting and not as good as an ISO100 shot.

However if you are only posting small non commercial images to the web, you'll probably notice very little difference, which is how this 'myth' started.

Print them properly at a decent size and you'll really see the difference.

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06-02-12, 07:14 PM
#20

Re: High Iso, how often...

I try to not go over about 800 at a push - I use 200-400 for bird stuff outside, 800 only for stuff that's worth grabbing despite conditions. Anything over that only for music stuff and grainy arty B&W stuff

xx
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